Method and device in UE and base station used for wireless communication

ABSTRACT

The present disclosure discloses a UE and a base station used for wireless communications. The UE receives Q control signaling groups respectively in Q time windows; receives a first control signaling that is used for determining Q1 time window(s) out of the Q time windows; and performs energy detection to determine whether to transmit on a first time-frequency resource; herein, any of the Q control signaling groups comprises a first field; any control signaling comprised by the Q control signaling groups comprises a first field; first fields comprised by control signalings in any of the Q control signaling groups are of a same value; among any Q2 adjacent control signaling groups of the Q control signaling groups, any two control signaling groups comprise first fields of different values; the first radio signal comprises first feedback information. The present disclosure not only ensures HARQ-ACK transmission but reduces signaling overhead redundancy.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2017/118540, filed Dec. 26, 2017, claims the priority benefit ofInternational Chinese Patent Application No. PCT/CN2017/118084, filed onDec. 22, 2017, the full disclosure of which is incorporated herein byreference.

BACKGROUND Technical Field

The present disclosure relates to transmission methods and devices inwireless communication systems, and in particular to a communicationmethod and device supporting data transmission on Unlicensed Spectrum.

Related Art

As future application scenarios of wireless communication systems becomeincreasingly diversified, varying performance requirements have beenposed on the systems. In order to meet such performance requirements ofvarious application scenarios, a study item of access to UnlicensedSpectrum under NR was approved at the 3^(rd) Generation Partner Project(3GPP) Radio Access Network (RAN) #75^(th) plenary session.

In Long Term Evolution (LTE) Licensed Assisted Access (LAA), atransmitter (i.e., a base station or a User Equipment) shall firstperform Listen Before Talk (LBT) before transmitting data on UnlicensedSpectrum so as to ensure that no interference will be caused to otherongoing wireless transmissions on the Unlicensed Spectrum. In theprocess of Cat 4 LBT (refer to 3GPP TR36.889), the transmitter also willexperience backoff after a certain defer duration and the time length ofthe backoff is calculated based on slot durations in a Clear ChannelAssessment (CCA). The number of slot durations in the backoff isobtained through the transmitter's random selection of Contention WindowSize (CWS). For downlink transmission, the CWS is adjusted according toa Hybrid Automatic Repeat reQuest (HARQ) feedback corresponding to datacomprised in a reference sub-frame previously transmitted on theUnlicensed Spectrum. While for uplink transmission, the CWS is adjustedaccording to whether there is new data in data comprised in a referencesub-frame previously transmitted on the Unlicensed Spectrum.

In the existing NR system, Downlink Grant Downlink Control Information(DCI) comprises a Downlink Assignment Index (DAI) field, which is usedto support codebook-based HARQ-ACK.

SUMMARY

Inventors find through researches that in LAA communications,particularly in StandAlone (SA)-LAA communications, a User Equipment(UE) has to perform LBT before transmitting an uplink HARQ-ACK, so thereis much uncertainty about the transmission time for uplink HARQ-ACK, andhow to transmit uplink HARQ-ACK in LAA communications becomes a problemthat needs solving.

To address the above problem, the present disclosure provides asolution. It should be noted that the embodiments of the presentdisclosure and the characteristics in the embodiments may be mutuallycombined if no conflict is incurred. Further, though originally targetedat LAA communications, the method and device in the present disclosureare also applicable to communications on Licensed Spectrum.

The present disclosure provides a method in a UE for wirelesscommunications, comprising:

receiving Q control signaling groups respectively in Q time windows, anyof the Q control signaling groups comprising a positive integer numberof control signaling(s);

receiving a first control signaling, the first control signalingindicating Q1 time window(s) out of the Q time windows; and

performing energy detection so as to determine whether to perform atransmission on a first time-frequency resource; if yes, a first radiosignal is transmitted in the first time-frequency resource, otherwise atransmission of the first radio signal is dropped in the firsttime-frequency resource;

herein, any two time windows of the Q time windows are orthogonal intime domain; any control signaling comprised by the Q control signalinggroups comprises a first field; for any of the Q control signalinggroups, first fields comprised in all the control signalings are of asame value; among any Q2 adjacent control signaling groups of the Qcontrol signaling groups, any two control signaling groups comprisefirst fields of different values; the first radio signal comprises firstfeedback information, the first feedback information is used fordetermining whether bit blocks transmitted in the Q1 time window(s) arecorrectly decoded, the Q is a positive integer greater than 1, and theQ1 and the Q2 are respectively positive integers no greater than the Q.

In one embodiment, the above method enables the base station todynamically configure a time window associated with the first radiosignal and used for transmitting downlink data, thus ensuring that aHARQ-ACK dropped due to LBT will be transmitted with a delay.

In one embodiment, the above method enables the base station todynamically configure a time window associated with the first radiosignal and used for transmitting downlink data, thereby triggering aretransmission of a HARQ-ACK which failed to be correctly received.

In one embodiment, the above first field can index a position of aHARQ-ACK bit for a corresponding time window in the first feedbackinformation to avoid possible confusion.

In one embodiment, the above first field can index a corresponding timewindow rather than slots in a corresponding time window, thus reducingsignaling redundancy the first field may incur.

In one embodiment, the Q control signaling groups and the first controlsignaling are transmitted on Unlicensed Spectrum.

In one embodiment, the first radio signal is transmitted on UnlicensedSpectrum.

Specifically, according to one aspect of the present disclosure,comprising:

receiving Q radio signal groups respectively in the Q time windows, theQ radio signal groups respectively comprise Q bit block groups, of whichany bit block group comprises a positive integer number of bit block(s),any radio signal group of the Q radio signal groups comprises a positiveinteger number of radio signal(s), wherein the positive integer numberof radio signal(s) respectively corresponds(correspond) to bit block(s)comprised in a corresponding bit block group;

herein, the bit blocks transmitted in the Q1 time window(s) comprise Q1bit block group(s) of the Q bit block groups, the Q1 bit block groups(s)is(are) respectively transmitted in the Q1 time window(s).

In one embodiment, the Q control signaling groups respectivelycorrespond to the Q radio signal groups, all control signalingscomprised in a control signaling group respectively correspond to allradio signals comprised in a corresponding radio signal group, a controlsignaling comprises configuration information of a corresponding radiosignal, and the configuration information comprises at least one ofoccupied time-domain resources, occupied frequency-domain resources, aModulation and Coding Status (MCS), a Redundancy Version (RV) or a NewData Indicator (NDI).

In one embodiment, a bit block in the Q bit block groups comprises atleast one Transport Block (TB).

In one embodiment, a bit block in the Q bit block groups comprises atleast one Code Block Group (CBG).

Specifically, according to one aspect of the present disclosure, thefirst control signaling is used for determining at least the firsttime-frequency resource between the first time-frequency resource andconfiguration information of the first radio signal, the configurationinformation comprises at least one of an MCS, an RV, an NDI or areception parameter set.

In one embodiment, the above method enables the base station todynamically configure time-frequency resources occupied by the firstradio signal, thus enhancing the flexibility of scheduling.

In one embodiment, the above method enables the base station to triggerthe first radio signal at the earliest possible time, thus reducingdelay in HARQ-ACK feedback.

In one embodiment, the reception parameter set comprises one or more ofa receiving beam, a receive beamforming matrix, a receive analogbeamforming vector, a receive beamforming vector and a receive spatialfiltering.

In one embodiment, the reception parameter set comprises Spatial Rxparameters.

In one embodiment, the reception parameter set comprises configurationsrelevant to a DeModulation Reference Signal (DMRS).

In one embodiment, the first radio signal explicitly indicates the firsttime-frequency resource and configuration information of the first radiosignal.

In one embodiment, the first radio signal implicitly indicates the firsttime-frequency resource and configuration information of the first radiosignal.

In one embodiment, the first radio signal comprises a first bit blockother than the first feedback information.

In one embodiment, a transmission channel for the first bit block is anUplink Shared Channel (UL-SCH).

Specifically, according to one aspect of the present disclosure, if anumber of the bit blocks transmitted in the Q1 time window(s) does notexceed a first threshold, it is indicated by one bit in the firstfeedback information whether each of the bit blocks transmitted in theQ1 time window(s) is correctly decoded; otherwise it is indicated by onebit in the first feedback information whether at least two bit blocks ofthe bit blocks transmitted in the Q1 time window(s) are correctlydecoded through a way of bundling; any two of the bit blocks transmittedin the Q1 time window(s) correspond to different transport blocks orcode block groups.

In one embodiment, the above method can determine a number of bitsoccupied by the first feedback information in advance, so as to avoidreserving excess or insufficient radio resources for the first feedbackinformation.

In one embodiment, when all bit blocks associated with a given bitthrough bundling are correctly decoded, the given bit is set as ACK bythe UE, otherwise the given bit is set as NACK by the UE.

In one embodiment, the phrase that any two of the bit blocks transmittedin the Q1 time window(s) correspond to different transport blocks orcode block groups means that bits in any two of the bit blockstransmitted in the Q1 time window(s) do not belong to a same code blockgroup (CBG).

In one embodiment, the phrase that any two of the bit blocks transmittedin the Q1 time window(s) correspond to different transport blocks orcode block groups means that bits in any two of the bit blockstransmitted in the Q1 time window(s) do not belong to a same transportblock (TB).

In one embodiment, any bit block of the bit blocks transmitted in the Q1time window(s) comprises at least one TB.

In one embodiment, any bit block of the bit blocks transmitted in the Q1time window(s) comprises at least one CBG.

In one embodiment, the first threshold is dependent on a number ofResource Elements (REs) occupied by the first time-frequency resource,of which each RE occupies a subcarrier in frequency domain and amulticarrier symbol in time domain.

In one embodiment, the first threshold depends on a channel type towhich the first time-frequency resource belongs.

In one embodiment, if the first time-frequency resource belongs to afirst channel type, the first threshold is a first candidate value; ifthe first time-frequency resource belongs to a second channel type, thefirst threshold is a second candidate value.

In one embodiment, the first channel type and the second channel typeare respectively Physical Uplink Control Channel (PUCCH) and PhysicalUplink Shared Channel (PUSCH).

In one embodiment, the first channel type and the second channel typeare two different types of PUCCH.

Specifically, according to one aspect of the present disclosure, thefirst feedback information comprises Q1 field(s), each of the Q1field(s) comprises an equal number of bits, the Q1 field(s) respectivelycorresponds(correspond) to the Q1 time window(s), and each of the Q1field(s) is used for determining whether bit block(s) transmitted in acorresponding time window is(are) correctly decoded.

In one embodiment, the above method can determine a number of bits andrespective positions of the bits in the first feedback informationassociated with each time window, thereby avoiding confusion.

In one embodiment, the above method prevents a situation where adownlink signaling is used to indicate for each time window the numberof bits associated with each time window and respective positions of thebits, hence a decrease in downlink signaling overhead.

In one embodiment, a number of slots in a time window is undeterminablein LAA communications; as a brief extension of a current proposal ofTime Division Duplex (TDD) in Long Term Evolution (LTE), there is needto reserve radio resources based on a largest possible number of slots,which leads to less efficient transmission; however, the above methoddisconnect the number of bits reserved from the number of slots in thetime window, thereby enhancing the transmission efficiency.

In one embodiment, the number of bits in each of the Q1 field(s) isfixed.

In one embodiment, the number of bits in each of the Q1 field(s) is 1.

In one embodiment, if a number of bit blocks transmitted in a given timewindow is greater than 1, then a corresponding field of the Q1 field(s)indicates through bundling whether all bit blocks transmitted in thegiven time window are correctly decoded.

In one embodiment, the number of bits in each of the Q1 field(s) isconfigurable.

In one embodiment, the number of bits in each of the Q1 field(s) issemi-statically configured.

In one embodiment, the number of bits in each of the Q1 field(s) isdynamically configured.

In one embodiment, the number of bits in each of the Q1 field(s) isdependent on a channel type to which the first time-frequency resourcebelongs.

In one embodiment, if the first time-frequency resource belongs to afirst channel type, then the number of bits in each of the Q1 field(s)is a third candidate value; if the first time-frequency resource belongsto a second channel type, then the number of bits in each of the Q1field(s) is a fourth candidate value;

In one embodiment, the first channel type and the second channel typeare respectively PUCCH and PUSCH.

In one embodiment, the first channel type and the second channel typeare two different types of PUCCH.

In one embodiment, for each field of the Q1 field(s), if a number ofbits comprised is less than that of bit blocks transmitted in acorresponding time window, then at least two bit blocks transmitted inthe corresponding time window are bundled by one bit to indicate whetherthese two bits are correctly decoded; otherwise bit blocks in thecorresponding time window are respectively indicated by one bit whetherthese bit blocks are correctly decoded.

Specifically, according to one aspect of the present disclosure, thefirst feedback information comprises Q1 field(s), the Q1 field(s)respectively corresponds(correspond) to the Q1 time window(s), and eachof the Q1 field(s) is used for determining whether bit block(s)transmitted in a corresponding time window is(are) correctly decoded,the first control signaling is used for determining the number of bitblock(s) comprised in each of the Q1 field(s).

In one embodiment, the Q1 field(s) each comprises(comprise) an equalnumber of bits.

The above embodiment strikes a balance between overhead of a downlinksignaling and overhead of an uplink signaling, so that transmissionefficiency is optimized.

Specifically, according to one aspect of the present disclosure, thefirst control signaling is transmitted in a first time window, the firstcontrol signaling comprises a second field, and the second field in thefirst control signaling is used for determining at least one of thefollowing:

An accumulative number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising downlink control information (DCI) of atarget format up to a current serving cell and a current PDCCHmonitoring occasion in the first time window, first in ascending orderof serving cell index and second in ascending order of PDCCH monitoringoccasion index;

a total number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising DCI of a target format up to a current PDCCH monitoringoccasion in the first time window.

In one embodiment, the second field is a DAI field.

In one embodiment, the second field is composed of 4 bits.

In one embodiment, the first control signaling is Uplink (UL) Grant DCI.

In one embodiment, the first time window is a latest time window amongthe Q time windows.

In one embodiment, the first time window is a latest time window amongthe Q1 time windows.

In one embodiment, the first time window is a time window outside the Qtime windows.

In one subembodiment, there is at least one unoccupied multicarriersymbol between the first time window and a latest time window among theQ time windows.

In one embodiment, the present serving cell and the present PDCCHOccasion are respectively a serving cell carrying the first controlinformation and a PDCCH Occasion carrying the first control information.

In one embodiment, the downlink control information of the target formatrefers to Downlink (DL) Grant DCI detected by the UE.

In one embodiment, the downlink control information of the target formatcomprises non-UL Grant DCI detected by the UE.

In one embodiment, the DL Grant DCI comprises DCI format 1_0 and DCIformat 1_1.

The present disclosure provides a method in a base station for wirelesscommunications, comprising:

transmitting Q control signaling groups respectively in Q time windows,any of the Q control signaling groups comprising a positive integernumber of control signaling(s);

transmitting a first control signaling, the first control signalingindicating Q1 time window(s) out of the Q time windows; and

monitoring a first radio signal on a first time-frequency resource;

herein, any two time windows of the Q time windows are orthogonal intime domain; any control signaling comprised by the Q control signalinggroups comprises a first field; for any of the Q control signalinggroups, first fields comprised in all the control signalings are of asame value; among any Q2 adjacent control signaling groups of the Qcontrol signaling groups, any two control signaling groups comprisefirst fields of different values; the first radio signal comprises firstfeedback information, the first feedback information is used fordetermining whether bit blocks transmitted in the Q1 time window(s) arecorrectly decoded, the Q is a positive integer greater than 1, and theQ1 and the Q2 are respectively positive integers no greater than the Q.

In one embodiment, the base station determines through blind detectionwhether the first radio signal exists in the first time-frequencyresource.

In one embodiment, the blind detection comprises energy detection.

In one embodiment, the blind detection comprises detecting acharacteristic sequence.

In one embodiment, the first feedback information comprises one or morecheck bits, and the base station performs channel decoding based on aradio signal received on the first time-frequency resource; if an outputfrom the channel decoding passes the check by the one or more checkbits, the base station deems that the first feedback information iscorrectly received; otherwise the base station deems that the firstfeedback information fails to be correctly received.

Specifically, according to one aspect of the present disclosure,comprising:

transmitting Q radio signal groups respectively in the Q time windows,the Q radio signal groups respectively comprise Q bit block groups, ofwhich any bit block group comprises a positive integer number of bitblock(s), any radio signal group of the Q radio signal groups comprisesa positive integer number of radio signal(s), wherein the positiveinteger number of radio signal(s) respectively corresponds(correspond)to bit block(s) comprised in a corresponding bit block group;

herein, the bit blocks transmitted in the Q1 time window(s) comprise Q1bit block group(s) of the Q bit block groups, the Q1 bit block groups(s)is(are) respectively transmitted in the Q1 time window(s).

Specifically, according to one aspect of the present disclosure, thefirst control signaling is used for determining at least the firsttime-frequency resource between the first time-frequency resource andconfiguration information of the first radio signal, the configurationinformation comprises at least one of an MCS, a Redundancy Version (RV),a New Data Indication (NDI) or a reception parameter set.

Specifically, according to one aspect of the present disclosure, if anumber of the bit blocks transmitted in the Q1 time window(s) does notexceed a first threshold, it is indicated by one bit in the firstfeedback information whether each of the bit blocks transmitted in theQ1 time window(s) is correctly decoded; otherwise it is indicated by onebit in the first feedback information whether at least two bit blocks ofthe bit blocks transmitted in the Q1 time window(s) are correctlydecoded through a way of bundling; any two bit blocks of the bit blockstransmitted in the Q1 time window(s) correspond to different transportblocks or code block groups.

Specifically, according to one aspect of the present disclosure, thefirst feedback information comprises Q1 field(s), each of the Q1field(s) comprises an equal number of bits, the Q1 field(s) respectivelycorresponds(correspond) to the Q1 time window(s), and each of the Q1field(s) is used for determining whether bit block(s) transmitted in acorresponding time window is(are) correctly decoded.

Specifically, according to one aspect of the present disclosure, thefirst feedback information comprises Q1 field(s), the Q1 field(s)respectively corresponds(correspond) to the Q1 time window(s), and eachof the Q1 field(s) is used for determining whether bit block(s)transmitted in a corresponding time window is(are) correctly decoded,the first control signaling is used for determining the number of bitblock(s) comprised in each of the Q1 field(s).

Specifically, according to one aspect of the present disclosure, thefirst control signaling is transmitted in a first time window, the firstcontrol signaling comprises a second field, and the second field in thefirst control signaling is used for determining at least one of thefollowing:

An accumulative number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising downlink control information (DCI) of atarget format up to a current serving cell and a current PDCCHmonitoring occasion in the first time window, first in ascending orderof serving cell index and second in ascending order of PDCCH monitoringoccasion index;

a total number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising DCI of a target format up to a current PDCCH monitoringoccasion in the first time window.

The present disclosure provides a UE for wireless communications,comprising:

a first receiver: receiving Q control signaling groups respectively in Qtime windows, any of the Q control signaling groups comprising apositive integer number of control signaling(s); and receiving a firstcontrol signaling, the first control signaling indicating Q1 timewindow(s) out of the Q time windows;

a first transmitter: performing energy detection so as to determinewhether to perform a transmission on a first time-frequency resource; ifyes, a first radio signal is transmitted in the first time-frequencyresource, otherwise a transmission of the first radio signal is droppedin the first time-frequency resource;

herein, any two time windows of the Q time windows are orthogonal intime domain; any control signaling comprised by the Q control signalinggroups comprises a first field; for any of the Q control signalinggroups, first fields comprised in all the control signalings are of asame value; among any Q2 adjacent control signaling groups of the Qcontrol signaling groups, any two control signaling groups comprisefirst fields of different values; the first radio signal comprises firstfeedback information, the first feedback information is used fordetermining whether bit blocks transmitted in the Q1 time window(s) arecorrectly decoded, the Q is a positive integer greater than 1, and theQ1 and the Q2 are respectively positive integers no greater than the Q.

In one embodiment, the above UE for wireless communications ischaracterized in that the first receiver receives Q radio signal groupsrespectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), and the positive integer number of radio signal(s)respectively corresponds(correspond) to bit block(s) comprised in acorresponding bit block group; herein, the bit blocks transmitted in theQ1 time window(s) comprise Q1 bit block group(s) of the Q bit blockgroups, and the Q1 bit block groups(s) is(are) respectively transmittedin the Q1 time window(s).

In one embodiment, the above UE for wireless communications ischaracterized in that the first control signaling is used fordetermining at least the first time-frequency resource between the firsttime-frequency resource and configuration information of the first radiosignal, the configuration information comprises at least one of an MCS,an RV, an NDI or a reception parameter set.

In one embodiment, the above UE for wireless communications ischaracterized in that if a number of the bit blocks transmitted in theQ1 time window(s) does not exceed a first threshold, it is indicated byone bit in the first feedback information whether each of the bit blockstransmitted in the Q1 time window(s) is correctly decoded; otherwise itis indicated by one bit in the first feedback information whether atleast two bit blocks of the bit blocks transmitted in the Q1 timewindow(s) are correctly decoded through a way of bundling; any two bitblocks of the bit blocks transmitted in the Q1 time window(s) correspondto different transport blocks or code block groups.

In one embodiment, the above UE for wireless communications ischaracterized in that the first feedback information comprises Q1field(s), each of the Q1 field(s) comprises an equal number of bits, theQ1 field(s) respectively corresponds(correspond) to the Q1 timewindow(s), and each of the Q1 field(s) is used for determining whetherbit block(s) transmitted in a corresponding time window is(are)correctly decoded.

In one embodiment, the above UE for wireless communications ischaracterized in that the first feedback information comprises Q1field(s), the Q1 field(s) respectively corresponds(correspond) to the Q1time window(s), and each of the Q1 field(s) is used for determiningwhether bit block(s) transmitted in a corresponding time window is(are)correctly decoded, the first control signaling is used for determiningthe number of bit block(s) comprised in each of the Q1 field(s).

In one embodiment, the above UE for wireless communications ischaracterized in that the first control signaling is transmitted in afirst time window, the first control signaling comprises a second field,and the second field in the first control signaling is used fordetermining at least one of the following:

An accumulative number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising downlink control information (DCI) of atarget format up to a current serving cell and a current PDCCHmonitoring occasion in the first time window, first in ascending orderof serving cell index and second in ascending order of PDCCH monitoringoccasion index;

a total number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising DCI of a target format up to a current PDCCH monitoringoccasion in the first time window.

The present disclosure provides a base station for wirelesscommunications, comprising:

a second transmitter: transmitting Q control signaling groupsrespectively in Q time windows, any of the Q control signaling groupscomprising a positive integer number of control signaling(s); andtransmitting a first control signaling, the first control signalingindicating Q1 time window(s) out of the Q time windows;

a second receiver: monitoring a first radio signal on a firsttime-frequency resource;

herein, any two time windows of the Q time windows are orthogonal intime domain; any control signaling comprised by the Q control signalinggroups comprises a first field; for any of the Q control signalinggroups, first fields comprised in all the control signalings are of asame value; among any Q2 adjacent control signaling groups of the Qcontrol signaling groups, any two control signaling groups comprisefirst fields of different values; the first radio signal comprises firstfeedback information, the first feedback information is used fordetermining whether bit blocks transmitted in the Q1 time window(s) arecorrectly decoded, the Q is a positive integer greater than 1, and theQ1 and the Q2 are respectively positive integers no greater than the Q.

In one embodiment, the above base station for wireless communications ischaracterized in that the second transmitter transmits Q radio signalgroups respectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), and the positive integer number of radio signal(s)respectively corresponds(correspond) to bit block(s) comprised in acorresponding bit block group; herein, the bit blocks transmitted in theQ1 time window(s) comprise Q1 bit block group(s) of the Q bit blockgroups, the Q1 bit block groups(s) is(are) respectively transmitted inthe Q1 time window(s).

In one embodiment, the above base station for wireless communications ischaracterized in that the first control signaling is used fordetermining at least the first time-frequency resource between the firsttime-frequency resource and configuration information of the first radiosignal, the configuration information comprises at least one of an MCS,an RV, an NDI or a reception parameter set.

In one embodiment, the above base station for wireless communications ischaracterized in that if a number of the bit blocks transmitted in theQ1 time window(s) does not exceed a first threshold, it is indicated byone bit in the first feedback information whether each of the bit blockstransmitted in the Q1 time window(s) is correctly decoded; otherwise itis indicated by one bit in the first feedback information whether atleast two bit blocks of the bit blocks transmitted in the Q1 timewindow(s) are correctly decoded through a way of bundling; any two bitblocks of the bit blocks transmitted in the Q1 time window(s) correspondto different transport blocks or code block groups.

In one embodiment, the above base station for wireless communications ischaracterized in that the first feedback information comprises Q1field(s), each of the Q1 field(s) comprises an equal number of bits, theQ1 field(s) respectively corresponds(correspond) to the Q1 timewindow(s), and each of the Q1 field(s) is used for determining whetherbit block(s) transmitted in a corresponding time window is(are)correctly decoded.

In one embodiment, the above base station for wireless communications ischaracterized in that the first feedback information comprises Q1field(s), the Q1 field(s) respectively corresponds(correspond) to the Q1time window(s), and each of the Q1 field(s) is used for determiningwhether bit block(s) transmitted in a corresponding time window is(are)correctly decoded, the first control signaling is used for determiningthe number of bit block(s) comprised in each of the Q1 field(s).

In one embodiment, the above base station for wireless communications ischaracterized in that the first control signaling is transmitted in afirst time window, the first control signaling comprises a second field,and the second field in the first control signaling is used fordetermining at least one of the following:

An accumulative number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising downlink control information (DCI) of atarget format up to a current serving cell and a current PDCCHmonitoring occasion in the first time window, first in ascending orderof serving cell index and second in ascending order of PDCCH monitoringoccasion index;

a total number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising DCI of a target format up to a current PDCCH monitoringoccasion in the first time window.

In one embodiment, the present disclosure has the following advantagesover prior art:

ensuring that a HARQ-ACK dropped due to LBT can be transmitted with adelay;

the base station capable of dynamically configuring a time windowassociated with the first radio signal and used for transmittingdownlink data, thereby triggering a retransmission of a HARQ-ACK whichfailed to be received correctly;

avoiding confusion;

reducing signaling redundancy;

balancing the overhead of downlink signaling and the uplink signaling toimprove transmission efficiency;

and increasing the flexibility of scheduling and latency of HARQ-ACKfeedback.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features, objects and advantages of the present disclosure willbecome more apparent from the detailed description of non-restrictiveembodiments taken in conjunction with the following drawings:

FIG. 1 illustrates a flowchart of processing at UE side according to oneembodiment of the present disclosure.

FIG. 2 illustrates a schematic diagram of a network architectureaccording to one embodiment of the present disclosure.

FIG. 3 illustrates a schematic diagram of a radio protocol architectureof a user plane and a control plane according to one embodiment of thepresent disclosure.

FIG. 4 illustrates a schematic diagram of a New Radio (NR) node and a UEaccording to one embodiment of the present disclosure.

FIG. 5 illustrates a flowchart of wireless transmission according to oneembodiment of the present disclosure.

FIG. 6 illustrates a flowchart of determining whether to transmit afirst radio signal on a first time-frequency resource according to oneembodiment of the present disclosure.

FIG. 7 illustrates a schematic diagram of multiple time windowsaccording to one embodiment of the present disclosure.

FIG. 8 illustrates a schematic diagram of a time window being composedof multiple slots according to one embodiment of the present disclosure.

FIG. 9 illustrates a schematic diagram of a plurality of time-frequencyresource pools belonging to a same sub-band according to one embodimentof the present disclosure.

FIG. 10 illustrates a schematic diagram of a plurality of time-frequencyresource pools belonging to different sub-bands according to oneembodiment of the present disclosure.

FIG. 11 illustrates a schematic diagram of a plurality of time-frequencyresource pools in a same time window according to one embodiment of thepresent disclosure.

FIG. 12 illustrates a schematic diagram of first feedback informationaccording to one embodiment of the present disclosure.

FIG. 13 illustrates a schematic diagram of a given control signalingaccording to one embodiment of the present disclosure.

FIG. 14 illustrates a schematic diagram of a first control signalingaccording to one embodiment of the present disclosure.

FIG. 15 illustrates a structure block diagram of a processing device ina UE according to one embodiment of the present disclosure.

FIG. 16 illustrates a structure block diagram of a processing device ina base station according to one embodiment of the present disclosure.

FIG. 17 illustrates a flowchart of determining whether to transmit afirst radio signal on a first time-frequency resource according to oneembodiment of the present disclosure.

EMBODIMENT 1

Embodiment 1 illustrates a flowchart of processing at UE side, as shownin FIG. 1.

In Embodiment 1, the UE receives Q control signaling groups respectivelyin Q time windows, and receives a first control signaling, herein any ofthe Q control signaling groups comprising a positive integer number ofcontrol signaling(s), and the first control signaling indicating Q1 timewindow(s) out of the Q time windows; the UE performs energy detection soas to determine whether to perform a transmission on a firsttime-frequency resource; if yes, a first radio signal is transmitted inthe first time-frequency resource, otherwise a transmission of the firstradio signal is dropped in the first time-frequency resource.

In Embodiment 1, any two time windows of the Q time windows areorthogonal in time domain; any control signaling comprised by the Qcontrol signaling groups comprises a first field; for any of the Qcontrol signaling groups, first fields comprised in all the controlsignalings are of a same value; among any Q2 adjacent control signalinggroups of the Q control signaling groups, any two control signalinggroups comprise first fields of different values; the first radio signalcomprises first feedback information, the first feedback information isused for determining whether bit blocks transmitted in the Q1 timewindow(s) are correctly decoded, the Q is a positive integer greaterthan 1, and the Q1 and the Q2 are respectively positive integers nogreater than the Q.

In one embodiment, any control signaling in any control signaling groupamong the Q control signaling groups is a piece of DCI.

In one embodiment, the first field comprises 2 bits.

In one embodiment, the first field comprises 3 bits.

In one embodiment, the first field comprises 4 bits.

In one embodiment, any two of the Q time windows are orthogonal.

In one embodiment, the bit block belongs to a TB.

In one embodiment, the bit block is a CBG.

In one embodiment, the bit block comprises a plurality of bits.

In one embodiment, there is at least one unoccupied multicarrier symbolin between any two time windows of the Q time windows.

In one embodiment, a monitoring on a downlink signaling of a specifictype can be used for determining whether one or more multicarriersymbols are occupied.

In one embodiment, the downlink signaling of a specific type is DCIidentified by a Common Channel Radio Network Temporary Identifier(CC-RNTI).

In one embodiment, if the downlink signaling of a specific type can bedetected and the downlink signaling of the specific type indicates thatone or more multicarrier symbols are occupied, then the UE assumes thatthe one or more multicarrier symbols are occupied, otherwise, the UEassumes that the one or more multicarrier symbols are unoccupied.

In one embodiment, the Q1 time window(s) is(are) Q1 latest timewindow(s) among the Q time windows.

In one embodiment, a first multicarrier symbol and a second multicarriersymbol are respectively an earliest multicarrier symbol and a latestmulticarrier symbol in the Q time windows, and between the firstmulticarrier symbol and the second multicarrier symbol there does notexist an occupied multicarrier symbol outside the Q time windows.

In one embodiment, control signalings comprised in the Q controlsignaling groups are all cell-common.

In one embodiment, control signalings comprised in the Q controlsignaling groups are all UE-specific.

In one embodiment, the first control signaling is transmitted in alatest one of the Q time windows.

In one embodiment, the first radio signal is transmitted on a physicallayer data channel.

In one embodiment, the physical layer data channel is a physical layerchannel capable of carrying physical layer data.

In one embodiment, the physical layer data channel is a PUSCH.

In one embodiment, the physical layer data channel is a shorten PUSCH(sPUSCH).

In one embodiment, the first radio signal is transmitted on a physicallayer control channel.

In one embodiment, the physical layer control channel is a physicallayer channel only capable of carrying a physical layer controlsignaling.

In one embodiment, the physical layer control channel is a PUCCH.

In one embodiment, the physical layer control channel is a shorternPUCCH (sPUCCH).

In one embodiment, the first control signaling is UL Grant DCI.

In one embodiment, the first control signaling is DL Grant DCI.

In one embodiment, each of the Q control signaling groups is transmittedon Unlicensed Spectrum.

In one embodiment, all control signalings comprised in any controlsignaling group of the Q control signaling groups are transmitted on asame carrier.

In one embodiment, among the Q control signaling groups there are atleast two control signaling groups transmitted respectively on twocarriers.

In one embodiment, all control signalings comprised in any controlsignaling group of the Q control signaling groups are transmitted on asame serving cell.

In one embodiment, among the Q control signaling groups there are atleast two control signaling groups transmitted respectively on twoserving cells.

In one embodiment, the first time-frequency resource comprises aplurality of REs, of which each RE occupies a multicarrier symbol intime domain and a subcarrier in frequency domain.

EMBODIMENT 2

Embodiment 2 illustrates a schematic diagram of a network architecture,as shown in FIG. 2.

FIG. 2 is a diagram illustrating a network architecture 200 of Long-TermEvolution (LTE), Long-Term Evolution Advanced (LTE-A) and future 5Gsystems. The LTE network architecture 200 may be called an EvolvedPacket System (EPS) 200, which may comprise one or more UEs 201, anEvolved UMTS Terrestrial Radio Access Network New Radio (E-UTRAN-NR)202, a 5G-Core Network/Evolved Packet Core (5G-CN/EPC) 210, a HomeSubscriber Server (HSS) 220 and an Internet Service 230, herein the UMTSrefers to Universal Mobile Telecommunications System. The EPS 200 may beinterconnected with other access networks. For simple description, theentities/interfaces are not shown. As shown in FIG. 2, the EPS 200provides packet switching services. Those skilled in the art will findit easy to understand that various concepts presented throughout thepresent disclosure can be extended to networks providing circuitswitching services. The E-UTRAN-NR 202 comprises an NR node B (gNB) 203and other gNBs 204. The gNB 203 provides UE 201-oriented user plane andcontrol plane terminations. The gNB 203 may be connected to other gNBs204 via an X2 interface (for example, backhaul). The gNB 203 may becalled a base station, a base transceiver station, a radio base station,a radio transceiver, a transceiver function, a Base Service Set (BSS),an Extended Service Set (ESS), a Transmitter Receiver Point (TRP) orsome other applicable terms. The gNB 203 provides an access point of the5G-CN/EPC 210 for the UE 201. Examples of UE 201 include cellularphones, smart phones, Session Initiation Protocol (SIP) phones, laptopcomputers, Personal Digital Assistant (PDA), Satellite Radios, GlobalPositioning Systems (GPSs), multimedia devices, video devices, digitalaudio players (for example, MP3 players), cameras, games consoles,unmanned aerial vehicles, air vehicles, narrow-band physical networkequipment, machine-type communication equipment, land vehicles,automobiles, wearable equipment, or any other devices having similarfunctions. Those skilled in the art also can call the UE 201 a mobilestation, a subscriber station, a mobile unit, a subscriber unit, awireless unit, a remote unit, a mobile device, a wireless device, aradio communication device, a remote device, a mobile subscriberstation, an access terminal, a mobile terminal, a wireless terminal, aremote terminal, a handset, a user proxy, a mobile client, a client orsome other appropriate terms. The gNB 203 is connected to the 5G-CN/EPC210 via an S1 interface. The 5G-CN/EPC 210 comprises a MobilityManagement Entity (MME) 211, other MMES 214, a Service Gateway (S-GW)212 and a Packet Date Network Gateway (P-GW) 213. The MME 211 is acontrol node for processing a signaling between the UE 201 and the5G-CN/EPC 210. Generally, the MME 211 provides bearer and connectionmanagement. All user Internet Protocol (IP) packets are transmittedthrough the S-GW 212. The S-GW 212 is connected to the P-GW 213. TheP-GW 213 provides UE IP address allocation and other functions. The P-GW213 is connected to the Internet Service 230. The Internet Service 230comprises operator-compatible IP services, specifically includingInternet, Intranet, IP Multimedia Subsystem (IMS) and Packet SwitchingStreaming (PSS) services.

In one embodiment, the UE 201 corresponds to the UE in the presentdisclosure.

In one embodiment, the gNB 203 corresponds to the base station in thepresent disclosure.

In one embodiment, the UE 201 supports wireless communications wheredata is transmitted on Unlicensed Spectrum.

In one embodiment, the gNB 203 supports wireless communications wheredata is transmitted on Unlicensed Spectrum.

In one embodiment, the UE 201 supports CBG-based HARQ retransmission.

In one embodiment, the gNB 203 supports CBG-based HARQ retransmission.

EMBODIMENT 3

Embodiment 3 illustrates a schematic diagram of a radio protocolarchitecture of a user plane and a control plane, as shown in FIG. 3.

FIG. 3 is a schematic diagram illustrating a radio protocol architectureof a user plane and a control plane. In FIG. 3, the radio protocolarchitecture for a UE and a gNB is represented by three layers, whichare a layer 1, a layer 2 and a layer 3, respectively. The layer 1 (L1)is the lowest layer and performs signal processing functions of variousPHY layers. The L1 is called PHY 301 in the present disclosure. Thelayer 2 (L2) 305 is above the PHY 301, and is in charge of the linkbetween the UE and the gNB via the PHY 301. In the user plane, L2 305comprises a Medium Access Control (MAC) sublayer 302, a Radio LinkControl (RLC) sublayer 303 and a Packet Data Convergence Protocol (PDCP)sublayer 304. All the three sublayers terminate at the gNBs of thenetwork side. Although not described in FIG. 3, the UE may compriseseveral protocol layers above the L2 305, such as a network layer (i.e.,IP layer) terminated at a P-GW 213 of the network side and anapplication layer terminated at the other side of the connection (i.e.,a peer UE, a server, etc.). The PDCP sublayer 304 provides multiplexingamong variable radio bearers and logical channels. The PDCP sublayer 304also provides a header compression for a higher-layer packet so as toreduce a radio transmission overhead. The PDCP sublayer 304 providessecurity by encrypting a packet and provides support for UE handoverbetween gNBs. The RLC sublayer 303 provides segmentation andreassembling of a higher-layer packet, retransmission of a lost packet,and reordering of a packet so as to compensate the disordered receivingcaused by HARQ. The MAC sublayer 302 provides multiplexing between alogical channel and a transport channel. The MAC sublayer 302 is alsoresponsible for allocating between UEs various radio resources (i.e.,resource blocks) in a cell. The MAC sublayer 302 is also in charge ofHARQ operation. In the control plane, the radio protocol architecture ofthe UE and the gNB is almost the same as the radio protocol architecturein the user plane on the PHY 301 and the L2 305, but there is no headercompression for the control plane. The control plane also comprises anRRC sublayer 306 in the layer 3 (L3). The RRC sublayer 306 isresponsible for acquiring radio resources (i.e., radio bearer) andconfiguring the lower layer using an RRC signaling between the gNB andthe UE.

In one embodiment, the radio protocol architecture in FIG. 3 isapplicable to the UE in the present disclosure.

In one embodiment, the radio protocol architecture in FIG. 3 isapplicable to the base station in the present disclosure.

In one embodiment, the DCI of the present disclosure is generated by thePHY 301.

In one embodiment, the first control signaling of the present disclosureis generated by the PHY 301.

In one embodiment, the first feedback information of the presentdisclosure is generated by the PHY 301.

In one embodiment, the Q control signaling groups of the presentdisclosure are generated by the PHY 301.

In one embodiment, the first control signaling of the present disclosureis generated by the MAC sublayer 302.

In one embodiment, the first control signaling of the present disclosureis generated by the RRC sublayer 306.

EMBODIMENT 4

Embodiment 4 illustrates a schematic diagram of a New Radio (NR) nodeand a UE, as shown in FIG. 4. FIG. 4 is a block diagram of a UE 450 anda gNB 410 in communication with each other in an access network.

The gNB 410 comprises a controller/processor 475, a memory 476, areceiving processor 470, a transmitting processor 416, a multi-antennareceiving processor 472, a multi-antenna transmitting processor 471, atransmitter/receiver 418 and an antenna 420.

The UE 450 comprises a controller/processor 459, a memory 460, a datasource 467, a transmitting processor 468, a receiving processor 456, amulti-antenna transmitting processor 457, a multi-antenna receivingprocessor 458, a transmitter/receiver 454 and an antenna 452.

In downlink (DL) transmission, at the gNB 410, a higher-layer packetfrom a core network is provided to the controller/processor 475. Thecontroller/processor 475 provides a function of the L2 layer. In DLtransmission, the controller/processor 475 provides header compression,encryption, packet segmentation and reordering, and multiplexing betweena logical channel and a transport channel, and radio resource allocationfor the UE 450 based on various priorities. The controller/processor 475is also in charge of HARQ operation, retransmission of a lost packet,and a signaling to the UE450. The transmitting processor 416 and themulti-antenna transmitting processor 471 perform signal processingfunctions used for the L1 layer (that is, PHY). The transmittingprocessor 416 performs coding and interleaving so as to ensure a ForwardError Correction (FEC) at the UE 450 side, and the mapping to signalclusters corresponding to each modulation scheme (i.e., BPSK, QPSK,M-PSK, M-QAM, etc.). The multi-antenna transmitting processor 471performs digital spatial precoding and/or beamforming on encoded andmodulated symbols to generate one or more spatial streams. Thetransmitting processor 416 then maps each spatial stream into asubcarrier. The mapped symbols are multiplexed with a reference signal(i.e., pilot frequency) in time domain and/or frequency domain, and thenthey are assembled through Inverse Fast Fourier Transform (IFFT) togenerate a physical channel carrying time-domain multi-carrier symbolstreams. After that the multi-antenna transmitting processor 471performs transmission analog precoding/beamforming on the time-domainmulti-carrier symbol streams. Each transmitter 418 converts a basebandmulticarrier symbol stream provided by the multi-antenna transmittingprocessor 471 into a radio frequency (RF) stream. Each radio frequencystream is later provided to different antennas 420.

In downlink (DL) transmission, at the UE 450, each receiver 454 receivesa signal via a corresponding antenna 452. Each receiver 454 recoversinformation modulated to the RF carrier, converts the radio frequencystream into a baseband multicarrier symbol stream to be provided to thereceiving processor 456. The receiving processor 456 and themulti-antenna receiving processor 458 perform signal processingfunctions of the L1 layer. The multi-antenna receiving processor 458performs receiving analog precoding/beamforming on a basebandmulticarrier symbol stream from the receiver 454. The receivingprocessor 456 converts the baseband multicarrier symbol stream from timedomain into frequency domain using FFT. In frequency domain, a physicallayer data signal and a reference signal are de-multiplexed by thereceiving processor 456, wherein the reference signal is used forchannel estimation, while the data signal is subjected to multi-antennadetection in the multi-antenna receiving processor 458 to recover any UE450-targeted spatial stream. Symbols on each spatial stream aredemodulated and recovered in the receiving processor 456 to generate asoft decision. Then the receiving processor 456 decodes andde-interleaves the soft decision to recover the higher-layer data andcontrol signal transmitted on the physical channel by the gNB 410. Next,the higher-layer data and control signal are provided to thecontroller/processor 459. The controller/processor 459 performsfunctions of the L2 layer. The controller/processor 459 can beassociated with a memory 460 that stores program code and data. Thememory 460 can be called a computer readable medium. In DL, thecontroller/processor 459 provides demultiplexing between a transportchannel and a logical channel, packet reassembling, decryption, headerdecompression and control signal processing so as to recover ahigher-layer packet from the core network. The higher-layer packet islater provided to all protocol layers above the L2 layer, or variouscontrol signals can be provided to the L3 layer for processing. Thecontroller/processor 459 also performs error detection using ACK and/orNACK protocols as a way to support HARQ operation.

In uplink (UL) transmission, at the UE 450, the data source 467 isconfigured to provide a higher-layer packet to the controller/processor459. The data source 467 represents all protocol layers above the L2layer. Similar to a transmitting function of the gNB 410 described in DLtransmission, the controller/processor 459 performs header compression,encryption, packet segmentation and reordering, and multiplexing betweena logical channel and a transport channel based on radio resourceallocation of the gNB 410 so as to provide the L2 layer functions usedfor the user plane and the control plane. The controller/processor 459is also responsible for HARQ operation, retransmission of a lost packet,and a signaling to the gNB 410. The transmitting processor 468 performsmodulation, mapping and channel coding. The multi-antenna transmittingprocessor 457 implements digital multi-antenna spatial precoding and/orbeamforming. Following that, the generated spatial streams are modulatedinto multicarrier/single-carrier symbol streams by the transmittingprocessor 468, and then modulated symbol streams are subjected to analogprecoding/beamforming in the multi-antenna transmitting processor 457and provided from the transmitters 454 to each antenna 452. Eachtransmitter 454 first converts a baseband symbol stream provided by themulti-antenna transmitting processor 457 into a radio frequency symbolstream, and then provides the radio frequency symbol stream to theantenna 452.

In uplink (UL) transmission, the function of the gNB 410 is similar tothe receiving function of the UE 450 described in DL transmission. Eachreceiver 418 receives a radio frequency signal via a correspondingantenna 420, converts the received radio frequency signal into abaseband signal, and provides the baseband signal to the multi-antennareceiving processor 472 and the receiving processor 470. The receivingprocessor 470 and multi-antenna receiving processor 472 collectivelyprovide functions of the L1 layer. The controller/processor 475 providesfunctions of the L2 layer. The controller/processor 475 can beassociated with the memory 476 that stores program code and data. Thememory 476 can be called a computer readable medium. In UL transmission,the controller/processor 475 provides de-multiplexing between atransport channel and a logical channel, packet reassembling,decryption, header decompression, control signal processing so as torecover a higher-layer packet from the UE 450. The higher-layer packetcoming from the controller/processor 475 may be provided to the corenetwork. The controller/processor 475 can also perform error detectionusing ACK and/or NACK protocols to support HARQ operation.

In one embodiment, the UE 450 comprises at least one processor and atleast one memory. The at least one memory includes computer programcodes. The at least one memory and the computer program codes areconfigured to be used in collaboration with the at least one processor.The UE 450 at least receives the Q control signaling groups of thepresent disclosure respectively in the Q time windows of the presentdisclosure, any of the Q control signaling groups comprising a positiveinteger number of control signaling(s); receives the first controlsignaling of the present disclosure, the first control signalingindicating Q1 time window(s) out of the Q time windows; and performsenergy detection so as to determine whether to perform a transmission ona first time-frequency resource; if yes, a first radio signal istransmitted in the first time-frequency resource, otherwise atransmission of the first radio signal is dropped in the firsttime-frequency resource.

In one embodiment, the UE 450 comprises a memory that stores a computerreadable instruction program. The computer readable instruction programgenerates an action when executed by at least one processor. The actionincludes: receiving the Q control signaling groups of the presentdisclosure respectively in the Q time windows of the present disclosure,any of the Q control signaling groups comprising a positive integernumber of control signaling(s); receiving the first control signaling ofthe present disclosure, the first control signaling indicating Q1 timewindow(s) out of the Q time windows; and performing energy detection soas to determine whether to perform a transmission on a firsttime-frequency resource; if yes, a first radio signal is transmitted inthe first time-frequency resource, otherwise a transmission of the firstradio signal is dropped in the first time-frequency resource.

In one embodiment, the UE 450 comprises at least one processor and atleast one memory. The at least one memory includes computer programcodes. The at least one memory and the computer program codes areconfigured to be used in collaboration with the at least one processor.The UE 450 at least receives the Q radio signal groups of the presentdisclosure respectively in the Q time windows of the present disclosure.

In one embodiment, the UE 450 comprises a memory that stores a computerreadable instruction program. The computer readable instruction programgenerates an action when executed by at least one processor. The actionincludes: receiving the Q radio signal groups of the present disclosurerespectively in the Q time windows of the present disclosure.

In one embodiment, the gNB 410 comprises at least one processor and atleast one memory. The at least one memory includes computer programcodes. The at least one memory and the computer program codes areconfigured to be used in collaboration with the at least one processor.The gNB 410 at least transmits the Q control signaling groups of thepresent disclosure respectively in the Q time windows of the presentdisclosure; transmits the first control signaling of the presentdisclosure; and monitors the first radio signal of the presentdisclosure on the first time-frequency resource of the presentdisclosure.

In one embodiment, the gNB 410 comprises a memory that stores a computerreadable instruction program. The computer readable instruction programgenerates an action when executed by at least one processor. The actionincludes: transmitting the Q control signaling groups of the presentdisclosure respectively in the Q time windows of the present disclosure;transmitting the first control signaling of the present disclosure; andmonitoring the first radio signal of the present disclosure on the firsttime-frequency resource of the present disclosure.

In one embodiment, the gNB 410 comprises at least one processor and atleast one memory. The at least one memory includes computer programcodes. The at least one memory and the computer program codes areconfigured to be used in collaboration with the at least one processor.The gNB 410 at least transmits the Q radio signal groups of the presentdisclosure respectively in the Q time windows of the present disclosure.

In one embodiment, the gNB 410 comprises a memory that stores a computerreadable instruction program. The computer readable instruction programgenerates an action when executed by at least one processor. The actionincludes: transmitting the Q radio signal groups of the presentdisclosure respectively in the Q time windows of the present disclosure.

In one embodiment, the UE 450 corresponds to the UE in the presentdisclosure.

In one embodiment, the gNB 410 corresponds to the base station in thepresent disclosure.

In one embodiment, at least one of the antenna 452, the receiver 454,the receiving processor 456, the multi-antenna receiving processor 458or the controller/processor 459 is used for receiving the Q controlsignaling groups of the present disclosure and the first controlsignaling of the present disclosure; at least one of the antenna 420,the transmitter 418, the transmitting processor 416, the multi-antennatransmitting processor 471 or the controller/processor 475 is used fortransmitting the Q control signaling groups of the present disclosureand the first control signaling of the present disclosure.

In one embodiment, at least one of the antenna 420, the receiver 418,the receiving processor 470, the multi-antenna receiving processor 472or the controller/processor 475 is used for receiving the first radiosignal of the present disclosure; at least one of the antenna 452, thetransmitter 454, the transmitting processor 468, the multi-antennatransmitting processor 457 or the controller/processor 459 is used fortransmitting the first radio signal of the present disclosure.

In one embodiment, at least one of the antenna 420, the receiver 418,the receiving processor 470, the multi-antenna receiving processor 472or the controller/processor 475 is used for receiving the Q radio signalgroups of the present disclosure; at least one of the antenna 452, thetransmitter 454, the transmitting processor 468, the multi-antennatransmitting processor 457 or the controller/processor 459 is used fortransmitting the Q radio signal groups of the present disclosure.

In one embodiment, at least one of the antenna 452, the receiver 454,the receiving processor 456, the multi-antenna receiving processor 458or the controller/processor 459 is used for performing the energydetection of the present disclosure.

EMBODIMENT 5

Embodiment 5 illustrates a flowchart of wireless transmission, as shownin FIG. 5. In FIG. 5, a base station N1 is a maintenance base stationfor a serving cell of a UE U2.

The N1 transmits Q control signaling groups respectively in Q timewindows and transmits Q radio signal groups respectively in Q timewindows in step S11; transmits a first control signaling in step S12;and monitors a first radio signal in step S13.

The U2 receives Q control signaling groups respectively in Q timewindows and receives Q radio signal groups respectively in Q timewindows in step S21; receives a first control signaling in step S22; andperforms energy detection in step S23 to determine whether to perform atransmission on a first time-frequency resource; if the result of theenergy detection is yes, a first radio signal is transmitted in thefirst time-frequency resource, or if the result is no, a transmission ofthe first radio signal is dropped in the first time-frequency resource.

In Embodiment 5, any of the Q control signaling groups comprises apositive integer number of control signaling(s); and the first controlsignaling indicates Q1 time window(s) out of the Q time windows; any twotime windows of the Q time windows are orthogonal in time domain; anycontrol signaling comprised by the Q control signaling groups comprisesa first field; for any of the Q control signaling groups, first fieldscomprised in all the control signalings are of a same value; among anyQ2 adjacent control signaling groups of the Q control signaling groups,any two control signaling groups comprise first fields of differentvalues; the first radio signal comprises first feedback information, thefirst feedback information is used for determining whether bit blockstransmitted in the Q1 time window(s) are correctly decoded, the Q is apositive integer greater than 1, and the Q1 and the Q2 are respectivelypositive integers no greater than the Q; the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), wherein the positive integer number of radiosignal(s) respectively corresponds(correspond) to bit block(s) comprisedin a corresponding bit block group; the bit blocks transmitted in the Q1time window(s) comprise Q1 bit block group(s) of the Q bit block groups,the Q1 bit block groups(s) is(are) respectively transmitted in the Q1time window(s).

In one embodiment, any bit block comprised in the Q bit block groupsbelongs to a TB.

In one embodiment, any bit block comprised in the Q bit block groupsbelongs to a CBG.

In one embodiment, any bit block comprised in the Q bit block groupscomprises one and only CBG.

In one embodiment, any bit block comprised in the Q bit block groupsonly comprises all or part of bits in a TB.

In one embodiment, any radio signal in the Q radio signal groups is anoutput from a corresponding bit block sequentially going through channelcoding, scrambling, Modulation Mapper, a Layer Mapper, precoding, aResource Element Mapper and broadband symbol generation.

In one embodiment, any radio signal in the Q radio signal groups is anoutput from a corresponding bit block sequentially going through channelcoding, scrambling, Modulation Mapper, a Layer Mapper, a transformprecoder, precoding, a Resource Element Mapper and broadband symbolgeneration.

In one embodiment, control signalings comprised in the Q controlsignaling groups are all cell-common.

In one embodiment, control signalings comprised in the Q controlsignaling groups are all identified by CC-RNTI.

In one embodiment, the Q control signaling groups respectivelycorrespond to the Q radio signal groups, all control signalings in anycontrol signaling group of the Q control signaling groups respectivelycorrespond to all radio signals comprised in a corresponding radiosignal group.

In one embodiment, any control signaling comprised in the Q controlsignaling groups comprises configuration information of a correspondingradio signal, and the configuration information comprises at least oneof an MCS, an RV or an NDI.

In one embodiment, any control signaling comprised in the Q controlsignaling groups is UL Grant DCI of a corresponding radio signal.

In one embodiment, any control signaling comprised in the Q controlsignaling groups and a corresponding radio signal are transmitted in asame slot of a same carrier, the slot comprising a positive integernumber of multicarrier symbol(s).

In one embodiment, the slot comprises 14 consecutive multicarriersymbols.

In one embodiment, the slot corresponds to time-domain resourcesoccupied by a Physical Resource Block (PRB).

EMBODIMENT 6

Embodiment 6 illustrates a flowchart of determining whether to transmita first radio signal on a first time-frequency resource, as shown inFIG. 6.

In Embodiment 6, the UE performs energy detection in step S101 todetermine whether to perform a transmission on a first time-frequencyresource; if yes, the UE transmits a first radio signal on the firsttime-frequency resource in step S102, otherwise the UE skips to an end,namely, dropping transmitting the first radio signal on the firsttime-frequency resource.

In one embodiment, the energy detection comprises T measurements, whichare respectively used for determining whether T given time-frequencyresources are occupied; if a number of unoccupied given time-frequencyresources among the T given time-frequency resources is greater than T1,the UE determines to transmit on the first time-frequency resource,otherwise the UE determines not to transmit on the first time-frequencyresource; the T is a positive integer, and the T1 is a positive integerno greater than the T.

In one embodiment, any two given time-frequency resources of the T giventime-frequency resources are orthogonal (that is, non-overlapping) intime domain, and each of the T given time-frequency resources isprevious to the first time-frequency resource.

In one embodiment, the T is configured by the base station.

In one embodiment, the energy detection corresponds to Cat 4 LBT.

In one embodiment, the energy detection corresponds to Cat 2 LBT.

EMBODIMENT 7

Embodiment 7 illustrates a schematic diagram of multiple time windows,as shown in FIG. 7.

In Embodiment 7, time window #0, time window #1, time window #2, andtime window #(Q−1) are respectively the Q time windows of the presentdisclosure, of which any time window comprises a positive integer numberof time window(s).

In one embodiment, the first control signaling of the present disclosureis transmitted in a first time window, the first time window is timewindow #Q in FIG. 7. The first control signaling is used for determiningat least the first time-frequency resource between the firsttime-frequency resource and configuration information of the first radiosignal, the configuration information comprises at least one of an MCS,an RV, an NDI or a reception parameter set.

In one embodiment, the first control signaling of the present disclosureis transmitted in a first time window, the first time window is timewindow #(Q−1) in FIG. 7. The first control signaling is used fordetermining at least the first time-frequency resource between the firsttime-frequency resource and configuration information of the first radiosignal, the configuration information comprises at least one of an MCS,an RV, an NDI or a reception parameter set.

In one embodiment, the first control signaling indicates Q1. The Q1 timewindow(s) of the present disclosure is(are) respectively Q1 latest timewindow(s) among the Q time windows, which is(are) time window #(Q−Q1),time window #(Q−Q1+1), time window #(Q−Q1+2), and time window #(Q−1).

In one embodiment, the Q time windows respectively correspond to Qdownlink bursts.

In one embodiment, at least two multicarrier symbols in the Q timewindows correspond to different subcarrier spacings.

In one embodiment, at least one time window of the Q time windowscomprises multicarrier symbols of various subcarrier spacings.

In one embodiment, on any carrier occupied by the Q radio signal groupsof the present disclosure, there is no multicarrier symbol beingoccupied by a transmitter of the Q radio signal groups between timewindow #0 and time window #(Q−1) and outside the Q time windows.

In one embodiment, a transmitter of the Q radio signal groups of thepresent disclosure occupies all multicarrier symbols in the Q timewindows.

In one embodiment, a transmitter of the Q radio signal groups of thepresent disclosure performs LBTs respectively before the Q time windowsto determine to transmit in the Q time windows.

In one embodiment, the multicarrier symbol is an Orthogonal FrequencyDivision Multiplexing (OFDM) symbol.

In one embodiment, the multicarrier symbol is a Single Carrier-FrequencyDivision Multiple Access (SC-FDMA) symbol.

In one embodiment, the multicarrier symbol is a Discrete FourierTransform Spread OFDM (DFT-S-OFDM) symbol.

In one embodiment, the multicarrier symbol is a Filter Bank MultiCarrier (FBMC) symbol.

In one embodiment, the multicarrier symbol comprises a Cyclic Prefix(CP).

In one embodiment, the first control signaling of the present disclosureis transmitted in a first time window, the first control signalingcomprises a second field, and the second field in the first controlsignaling is used for determining at least one of the following:

A first parameter: an accumulative number of {serving cell, PDCCHmonitoring occasion}-pair(s) comprising downlink control information(DCI) of a target format up to a current serving cell and a currentPDCCH monitoring occasion in the first time window, first in ascendingorder of serving cell index and second in ascending order of PDCCHmonitoring occasion index;

A second parameter: a total number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising DCI of a target format up to a currentPDCCH monitoring occasion in the first time window.

In one embodiment, each of the Q time windows comprises at least onePDCCH Occasion.

In one embodiment, the PDCCH Occasion comprises a positive integernumber of multicarrier symbol(s) in time domain and at least one servingcell in frequency domain.

In one embodiment, the second field in the first control signalingindicates at least one of a remainder left from the first parameterdivided by W1 or a remainder left from the second parameter divided byW2; the W1 and the W2 are positive integers greater than 1,respectively.

In one embodiment, the W1 and the W2 are equal.

In one embodiment, both the W1 and the W2 are 4.

EMBODIMENT 8

Embodiment 8 illustrates a schematic diagram of a time window beingcomposed of multiple slots, as shown in FIG. 8.

In Embodiment 8, time window #i is composed of L slots, L being apositive integer. The L slots respectively correspond to slot #i_1, slot#i_2, . . . and slot #i_L, and any of the L slots comprises a positiveinteger number of multicarrier symbol(s).

In one embodiment, all of the L slots comprise equal numbers ofmulticarrier symbols.

In one embodiment, the number of multicarrier symbols comprised in eachof the L slots is 14.

In one embodiment, all slots of the L slots other than slot #i_1 andslot #i_L at opposite ends comprise equal numbers of multicarriersymbols.

In one embodiment, the number of multicarrier symbols comprised in eachof the L slots other than slot #i_1 and slot #i_L at opposite ends is14.

In one embodiment, the time window #i is any time window among the Qtime windows of the present disclosure.

In one embodiment, the control signaling group of the present disclosurethat corresponds to the time window #i comprises L2 controlsignaling(s), and the L2 control signaling(s) is(are) respectivelytransmitted in L2 slot(s) of the L slots, the L2 being a positiveinteger no greater than the L.

In one embodiment, the L2 is equal to the L.

In one embodiment, the L2 is equal to the L, the L2 control signalingsrespectively indicate the numbers of multicarrier symbols respectivelyoccupied in the L slots.

In one subembodiment, the L2 control signalings are all cell-common.

In one subembodiment, the L2 control signalings are all identified byCC-RNTI.

In one embodiment, the radio signal group of the present disclosure thatcorresponds to the time window #i comprises L3 radio signal(s), and theL3 radio signal(s) is(are) respectively transmitted in L3 slot(s) of theL slots, the L3 being a positive integer no greater than the L.

In one embodiment, the L2 is equal to the L3, and the L2 controlsignaling(s) is(are) respectively scheduling signaling(s) of the L3radio signal(s).

In one subembodiment, each of the L2 control signaling(s) isUE-specific.

In one subembodiment, each of the L2 control signaling(s) is identifiedby Cell-RNTI (C-RNTI).

In one embodiment, each of the L slots comprises at least one PDCCHOccasion of the present disclosure.

In one embodiment, a slot comprises a positive integer number ofmulticarrier symbol(s).

In one embodiment, the PDCCH Occasion of the present disclosure is apart of a Control Resource Set (CoReset) that lies in a slot.

In one embodiment, the multicarrier symbol is an OFDM symbol.

In one embodiment, the multicarrier symbol is an SC-FDMA symbol.

In one embodiment, the multicarrier symbol is a DFT-S-OFDM symbol.

In one embodiment, the multicarrier symbol is an FBMC symbol.

In one embodiment, the multicarrier symbol comprises a CP.

EMBODIMENT 9

Embodiment 9 illustrates a schematic diagram of a plurality oftime-frequency resource pools belonging to a same sub-band, as shown inFIG. 9.

In Embodiment 9, time-frequency resource pools #0, #1 . . . , and #(Q−1)respectively belong to time windows #0, #1 . . . , and #(Q−1), and thetime-frequency resource pools #0, #1 . . . , and #(Q−1) all belong to afirst sub-band.

In Embodiment 9, the Q control signaling groups of the presentdisclosure are respectively transmitted in the time-frequency resourcepools #0, #1 . . . , and #(Q−1), and the Q radio signal groups of thepresent disclosure are also respectively transmitted in thetime-frequency resource pools #0, #1 . . . , and #(Q−1).

In one embodiment, the first sub-band is deployed at UnlicensedSpectrum.

In one embodiment, the first sub-band is a carrier.

In one embodiment, the first sub-band is a Bandwidth Part (BWP).

In one embodiment, the first sub-band is frequency-domain resourcesoccupied by a serving cell.

In one embodiment, the first time-frequency resource of the presentdisclosure is located within time-frequency pool #Q in FIG. 9.

In one embodiment, the first control signaling of the present disclosureis transmitted in time-frequency pool #Q in FIG. 9.

In one embodiment, the UE of the present disclosure performs LBTrespectively in the time-frequency resource pools #0, #1 . . . , and#(Q−1) to determine that an uplink HARQ-ACK cannot be transmitted intime-frequency resource sub-pools #0, #1 . . . , and #(Q−1), and thetime-frequency resource sub-pools #0, #1 . . . , and #(Q−1) respectivelybelong to the time-frequency resource pools #0, #1 . . . , and #(Q−1).

EMBODIMENT 10

Embodiment 10 illustrates a schematic diagram of a plurality oftime-frequency resource pools belonging to different sub-bands, as shownin FIG. 10.

In Embodiment 10, time-frequency resource pools #0, #1 . . . , and#(Q−1) respectively belong to time windows #0, #1 . . . , and #(Q−1) intime domain; the time-frequency resource pools #0, #1 . . . , and #(Q−1)occupy a plurality sub-bands in frequency domain, where the plurality ofsub-bands at least comprise sub-bands #0, #1, and #2.

In Embodiment 10, the Q control signaling groups of the presentdisclosure are transmitted respectively in the time-frequency resourcepools #0, #1 . . . , and #(Q−1), and the Q radio signal groups of thepresent disclosure are also transmitted respectively in thetime-frequency resource pools #0, #1 . . . , and #(Q−1).

In one embodiment, sub-band #0, sub-band #1 and sub-band #2 are deployedat Unlicensed Spectrum.

In one embodiment, the sub-bands #0, #1, and #2 each are carriersrespectively.

In one embodiment, the sub-bands #0, #1, and #2 each are BWPsrespectively.

EMBODIMENT 11

Embodiment 11 illustrates a schematic diagram of a plurality oftime-frequency resource pools in a same time window, as shown in FIG.11.

In Embodiment 11, time window #j is a given time window of the Q timewindows. A radio signal group among the Q radio signal groups of thepresent disclosure that corresponds to the time window #j comprisesthree radio signal sub-groups, which are a first radio signal sub-group,a second radio signal sub-group and a third radio signal sub-group. Thethree radio signal sub-groups respectively comprise a positive integernumber of radio signal(s). The first radio signal sub-group, the secondradio signal sub-group and the third radio signal sub-group aretransmitted respectively in time-frequency resource pools #j_0, #j_1 and#j_2 in FIG. 11; and the time-frequency resource pools #j_0, #j_1 and#j_2 respectively belong to three sub-bands in frequency domain.

In one embodiment, the three sub-bands are deployed at UnlicensedSpectrum.

In one embodiment, a control signaling group among the Q controlsignaling groups of the present disclosure that corresponds to the timewindow #j comprises three control signaling sub-groups, which are afirst control signaling sub-group, a second control signaling sub-groupand a third control signaling sub-group; each of the three controlsignaling sub-groups respectively comprises a positive integer number ofcontrol signaling(s). The first control signaling sub-group, the secondcontrol signaling sub-group and the third control signaling sub-groupare transmitted respectively in time-frequency resource pools #j_0, #j_1and #j_2 in FIG. 11; and the time-frequency resource pools #j_0, #j_1and #j_2 respectively belong to three sub-bands in frequency domain.

In one embodiment, the three sub-bands respectively correspond to threeserving cells.

In one embodiment, the first control signaling of the present disclosureis transmitted in a first time window, the first control signalingcomprises a second field, and the second field in the first controlsignaling is used for determining at least one of the following:

A first parameter: an accumulative number of {serving cell, PDCCHmonitoring occasion}-pair(s) comprising downlink control information(DCI) of a target format up to a current serving cell and a currentPDCCH monitoring occasion in the first time window, first in ascendingorder of serving cell index and second in ascending order of PDCCHmonitoring occasion index;

A second parameter: a total number of {serving cell, PDCCH monitoringoccasion}-pair(s) comprising DCI of a target format up to a currentPDCCH monitoring occasion in the first time window.

In one embodiment, the PDCCH Occasion comprises a positive integernumber of multicarrier symbol(s) in time domain and comprises at leastone serving cell in frequency domain.

In one embodiment, the PDCCH Occasion in the time window #j comprises apositive integer number of multicarrier symbol(s) in time domain andcomprises three serving cells in frequency domain.

In one embodiment, the second field in the first control signalingindicates at least one of a remainder left from the first parameterdivided by W1 or a remainder left from the second parameter divided byW2; the W1 and the W2 are positive integers greater than 1,respectively.

In one embodiment, the W1 and the W2 are equal.

In one embodiment, both the W1 and the W2 are 4.

EMBODIMENT 12

Embodiment 12 illustrates a schematic diagram of first feedbackinformation, as shown in FIG. 12.

In Embodiment 12, the first feedback information comprises Q1 fields,which are field #0, field #1, field #2 . . . , and field #(Q1−1) in FIG.12. The Q1 fields respectively correspond to the Q1 time windows of thepresent disclosure, and each of the Q1 fields is used for determiningwhether bit blocks transmitted in a corresponding time window iscorrectly decoded.

In one embodiment, each of the Q fields comprises an equal number ofbits.

In one embodiment, the first control signaling indicates the number ofbits in each of the Q1 fields.

In one embodiment, at least two of the Q1 fields comprise differentnumbers of bits.

In one embodiment, a given field of the Q1 fields is composed of twobits, if a number of bit blocks transmitted in a corresponding timewindow is no greater than 2, then the bit blocks transmitted in thecorresponding time window are respectively indicated by one bitcomprised in the given field whether each bit block is correctlydecoded; otherwise at least two of the bit blocks transmitted in thecorresponding time window are indicated by one bit comprised in thegiven field through bundling whether each bit block is correctlydecoded.

EMBODIMENT 13

Embodiment 13 illustrates a schematic diagram of a given controlsignaling, as shown in FIG. 13.

In Embodiment 13, the given control signaling comprises a first field,and a value of the first field in the given control signaling is equalto a remainder of an index of a time window corresponding to the givencontrol signaling when divided by Q2, wherein the Q2 is a positiveinteger greater than 1.

In one embodiment, the Q2 is 4.

In one embodiment, the given control signaling is any one controlsignaling in the Q control signaling groups of the present disclosure;all control signalings comprised in any control signaling group of the Qcontrol signaling groups comprise first fields of a same value, which isequal to a remainder of an index of a time window corresponding to theany control signaling group when divided by the Q2.

In one embodiment, indexes for the Q time windows are 0, 1, 2 . . . ,and Q−1, respectively.

In one embodiment, the given control signaling is the first controlsignaling of the present disclosure.

In one embodiment, the other field in FIG. 13 indicates multicarriersymbols occupied in a corresponding slot.

In one embodiment, the other field in FIG. 13 indicates configurationinformation of a corresponding radio signal.

EMBODIMENT 14

Embodiment 14 illustrates a schematic diagram of a first controlsignaling, as shown in FIG. 14.

In Embodiment 14, the first control signaling comprises at least thesecond field and the other field among a first field, a second field, athird field and the other field.

The other field in the first control signaling indicates the firsttime-frequency resource of the present disclosure.

The first control signaling is transmitted in a first time window, andthe second field in the first control signaling is used for determiningat least one of the following:

A first parameter, which is determined through the method below:initializing the first counter as 0; first sequencing each PDCCHOccasion in a first PDCCH Occasion set according to temporal order andthen traversing all {serving cell, PDCCH Occasion}-pair(s) in a firsttime window according to an ascending order of indexes of serving cellstill the (serving cell, PDCCH Occasion)-pair to which the first controlsignaling belongs; each time when a serving cell—PDCCH Occasion paircomprises DCI of a target format, the first counter is increased by 1;the first parameter is equal to the value of the first counter after thetraversing is completed.

A second parameter, which is determined through the method below:initializing the second counter as 0; first sequencing each PDCCHOccasion in a first PDCCH Occasion set according to temporal order andthen traversing all serving cell-PDCCH Occasion pairs in a first timewindow according to an ascending order of indexes of serving cells tillall the serving cells in a PDCCH Occasion to which the first controlsignaling belongs; each time when a serving cell—PDCCH Occasion paircomprises DCI of a target format, then the second counter is increasedby 1; the second parameter is equal to the value of the second counterafter traversing is completed.

In one embodiment, the first control signaling comprises a first field,and the first field in the first control signaling is used for indexingthe first time window.

In one embodiment, the other field in the first control signalingindicates the configuration information of the first radio signal.

In one embodiment, the first control signaling comprises a third field,and the third field in the first control signaling indicates the Q1 ofthe present disclosure.

EMBODIMENT 15

Embodiment 15 illustrates a structure block diagram of a processingdevice in a UE, as shown in FIG. 15. In Embodiment 15, a UE 1500comprises a first receiver 1501 and a first receiver 1502.

The first receiver 1501 receives Q control signaling groups respectivelyin Q time windows, any of the Q control signaling groups comprising apositive integer number of control signaling(s); and receives a firstcontrol signaling, the first control signaling indicating Q1 timewindow(s) out of the Q time windows.

The first transmitter 1502 performs energy detection so as to determinewhether to perform a transmission on a first time-frequency resource; ifyes, a first radio signal is transmitted in the first time-frequencyresource, otherwise a transmission of the first radio signal is droppedin the first time-frequency resource.

In Embodiment 15, any two time windows of the Q time windows areorthogonal in time domain; any control signaling comprised by the Qcontrol signaling groups comprises a first field; for any of the Qcontrol signaling groups, first fields comprised in all the controlsignalings are of a same value; among any Q2 adjacent control signalinggroups of the Q control signaling groups, any two control signalinggroups comprise first fields of different values; the first radio signalcomprises first feedback information, the first feedback information isused for determining whether bit blocks transmitted in the Q1 timewindow(s) are correctly decoded, the Q is a positive integer greaterthan 1, and the Q1 and the Q2 are respectively positive integers nogreater than the Q.

In one embodiment, the first transmitter 1502 receives Q radio signalgroups respectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), and the positive integer number of radio signal(s)respectively corresponds(correspond) to bit block(s) comprised in acorresponding bit block group; herein, the bit blocks transmitted in theQ1 time window(s) comprise Q1 bit block group(s) of the Q bit blockgroups, and the Q1 bit block groups(s) is(are) respectively transmittedin the Q1 time window(s).

In one embodiment, the first receiver 1501 comprises the antenna 452 andthe receiver 454 in FIG. 4.

In one embodiment, the first receiver 1501 comprises the multi-antennareceiving processor 458 and the receiving processor 456 in FIG. 4.

In one embodiment, the first receiver 1501 comprises the memory 460 inFIG. 4.

In one embodiment, the first receiver 1501 comprises thecontroller/processor 459 in FIG. 4.

In one embodiment, the first transmitter 1502 comprises the antenna 452and the transmitter 454 in FIG. 4.

In one embodiment, the first transmitter 1502 comprises themulti-antenna transmitting processor 457 and the transmitting processor468 in FIG. 4.

In one embodiment, the first transmitter 1502 comprises the data source467 in FIG. 4.

In one embodiment, the first transmitter 1502 comprises thecontroller/processor 459 in FIG. 4.

EMBODIMENT 16

Embodiment 16 illustrates a structure block diagram of a processingdevice in a base station, as shown in FIG. 16. In Embodiment 16, a basestation 1600 comprises a second transmitter 1601 and a second receiver1602.

The second transmitter 1601 transmits Q control signaling groupsrespectively in Q time windows, any of the Q control signaling groupscomprising a positive integer number of control signaling(s); andtransmits a first control signaling, the first control signalingindicating Q1 time window(s) out of the Q time windows.

The second receiver 1602 monitors a first radio signal on a firsttime-frequency resource.

In Embodiment 16, any two time windows of the Q time windows areorthogonal in time domain; any control signaling comprised by the Qcontrol signaling groups comprises a first field; for any of the Qcontrol signaling groups, first fields comprised in all the controlsignalings are of a same value; among any Q2 adjacent control signalinggroups of the Q control signaling groups, any two control signalinggroups comprise first fields of different values; the first radio signalcomprises first feedback information, the first feedback information isused for determining whether bit blocks transmitted in the Q1 timewindow(s) are correctly decoded, the Q is a positive integer greaterthan 1, and the Q1 and the Q2 are respectively positive integers nogreater than the Q.

The second transmitter 1601 transmits Q radio signal groups respectivelyin the Q time windows, the Q radio signal groups respectively comprise Qbit block groups, of which any bit block group comprises a positiveinteger number of bit block(s), any radio signal group of the Q radiosignal groups comprises a positive integer number of radio signal(s),and the positive integer number of radio signal(s) respectivelycorresponds(correspond) to bit block(s) comprised in a corresponding bitblock group; herein, the bit blocks transmitted in the Q1 time window(s)comprise Q1 bit block group(s) of the Q bit block groups, and the Q1 bitblock groups(s) is(are) respectively transmitted in the Q1 timewindow(s).

In one embodiment, the second transmitter 1601 comprises the antenna 420and the transmitter 418 in FIG. 4.

In one embodiment, the second transmitter 1601 comprises themulti-antenna transmitting processor 471 and the transmitting processor416 in FIG. 4.

In one embodiment, the second transmitter 1601 comprises thecontroller/processor 475 in FIG. 4.

In one embodiment, the second receiver 1602 comprises the antenna 420and the receiver 418 in FIG. 4.

In one embodiment, the second receiver 1602 comprises the multi-antennareceiving processor 472 and the receiving processor 470 in FIG. 4.

In one embodiment, the second receiver 1602 comprises the memory 476 inFIG. 4.

In one embodiment, the second receiver 1602 comprises thecontroller/processor 475 in FIG. 4.

EMBODIMENT 17

Embodiment 17 illustrates a flowchart of determining whether to transmita first radio signal on a first time-frequency resource, as shown inFIG. 17. Steps in box F1 are optional.

In Embodiment 17, a UE performs R measurements respectively in R timesub-pools. The energy detection of the present disclosure comprises theR measurements.

The UE performs the R measurements respectively in the R time sub-poolsto obtain R measured power values. Each of R1 measured power value(s) ofthe R measured power values is lower than a specific threshold. R1 timesub-pool(s) is(are) time sub-pool(s) corresponding to the R1 measuredpower value(s) among the R time sub-pools. The process of the Rmeasurements can be described as the flowchart in FIG. 17.

The UE is idle in step S1101 and determine whether to transmit in stepS1102; performs energy detection in a defer duration in step S1103; anddetermines in step S1104 whether all slot durations within the deferduration are idle, if yes, move forward to step S1105 to transmit afirst radio signal; otherwise move forward to step S1106 to performenergy detection in a defer duration; the UE determines in step S1107whether all slot durations within the defer duration are idle, if yes,move forward to step S1108 to set a first counter as R1; otherwise goback to step S1106; determines whether the first counter is 0 in stepS1109, if yes, move back to step S1105 to transmit the first radiosignal; otherwise move forward to step S1110 to perform energy detectionin an additional slot duration; determines in step S1111 whether theadditional slot duration is idle, if yes, move forward to step S1112 toreduce the first counter by 1 and then go back to step S1109; otherwisemove forward to step S1113 to perform energy detection in an additionaldefer duration; and determines in step S1114 whether all slot durationswithin the additional defer duration are idle, if yes, move back to stepS1112; otherwise go back to step S1113.

In one embodiment, the R1 is equal to 0; the UE determines in step S1104that all slot durations within the defer duration are idle.

In one embodiment, each of the R measured power values and the specificthreshold are measured by dBm.

In one embodiment, each of the R measured power values and the specificthreshold are measured by mW.

In one embodiment, each of the R measured power values and the specificthreshold are measured by J.

In one embodiment, the specific threshold is equal to or less than −72dBm.

In one embodiment, the R time sub-pools are of a same time duration.

In one embodiment, any time sub-pool of the R time sub-pools lasts nolonger than 25 μs.

In one embodiment, any time sub-pool of the R time sub-pools lasts nolonger than 34 μs.

In one embodiment, any time sub-pool of the R time sub-pools lasts nolonger than 9 μs.

In one embodiment, any time sub-pool of the R time sub-pools lasts nolonger than 16 μs.

The ordinary skill in the art may understand that all or part of stepsin the above method may be implemented by instructing related hardwarethrough a program. The program may be stored in a computer readablestorage medium, for example Read-Only-Memory (ROM), hard disk or compactdisc, etc. Optionally, all or part of steps in the above embodimentsalso may be implemented by one or more integrated circuits.Correspondingly, each module unit in the above embodiment may berealized in the form of hardware, or in the form of software functionmodules. The present disclosure is not limited to any combination ofhardware and software in specific forms. The first-type communicationdevice or UE or terminal in the present disclosure includes but is notlimited to mobile phones, tablet computers, notebooks, network cards,low-consumption equipment, eMTC equipment, NB-IoT equipment,vehicle-mounted communication equipment, aircrafts, airplanes, unmannedaerial vehicles, and telecontrolled aircrafts, etc. The second-typecommunication device, or base station or network side equipment in thepresent disclosure includes but is not limited to macro-cellular basestations, micro-cellular base stations, home base stations, relay basestation, eNB, gNB, Transmitter Receiver Point (TRP), relay satellites,satellite base stations, airborne base station and other radiocommunication equipment.

The above are merely the preferred embodiments of the present disclosureand are not intended to limit the scope of protection of the presentdisclosure. Any modification, equivalent substitute and improvement madewithin the spirit and principle of the present disclosure are intendedto be included within the scope of protection of the present disclosure.

What is claimed is:
 1. A method in a user equipment (UE) for wirelesscommunications, comprising: receiving Q control signaling groupsrespectively in Q time windows, any of the Q control signaling groupscomprising a positive integer number of control signaling(s); receivinga first control signaling, the first control signaling indicating Q1time window(s) out of the Q time windows; and performing energydetection so as to determine whether to perform a transmission on afirst time-frequency resource; if yes, performing the transmission totransmit a first radio signal on the first time-frequency resource,otherwise not performing the transmission on the first time-frequencyresource; wherein any two time windows of the Q time windows areorthogonal in time domain; any control signaling comprised by the Qcontrol signaling groups comprises a first field; among the Q controlsignaling groups, first fields of same control signaling groups are of asame value; among Q2 adjacent control signaling groups of the Q controlsignaling groups, first fields of different control signaling groups areof different values; the first radio signal comprises first feedbackinformation, the first feedback information is used for determiningwhether bit blocks transmitted in the Q1 time window(s) are correctlydecoded, the Q is a positive integer greater than 1, and the Q1 and theQ2 are respectively positive integers no greater than the Q.
 2. Themethod according to claim 1, comprising: receiving Q radio signal groupsrespectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), wherein the positive integer number of radiosignal(s) respectively corresponds(correspond) to bit block(s) comprisedin a corresponding bit block group; wherein the bit blocks transmittedin the Q1 time window(s) comprise Q1 bit block group(s) of the Q bitblock groups, and the Q1 bit block groups(s) is(are) respectivelytransmitted in the Q1 time window(s).
 3. The method according to claim1, wherein the first control signaling is used for determining at leastthe first time-frequency resource between the first time-frequencyresource and configuration information of the first radio signal, theconfiguration information comprises at least one of a Modulation andCoding Status, a Redundancy Version (RV), a New Data Indication (NDI) ora reception parameter set.
 4. The method according to claim 1, whereinthe first feedback information comprises Q1 field(s), each of the Q1field(s) comprises an equal number of bits, the Q1 field(s) respectivelycorresponds(correspond) to the Q1 time window(s), and each of the Q1field(s) is used for determining whether bit block(s) transmitted in acorresponding time window is(are) correctly decoded.
 5. The methodaccording to claim 1, wherein the first feedback information comprisesQ1 field(s), the Q1 field(s) respectively corresponds(correspond) to theQ1 time window(s), and each of the Q1 field(s) is used for determiningwhether bit block(s) transmitted in a corresponding time window is(are)correctly decoded, the first control signaling is used for determiningthe number of bit block(s) comprised in each of the Q1 field(s).
 6. Themethod according to claim 1, wherein the first control signaling istransmitted in a first time window, the first control signalingcomprises a second field, and the second field in the first controlsignaling is used for determining at least one of the following: anaccumulative number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising downlink control information (DCI) of a target format up to acurrent serving cell and a current PDCCH monitoring occasion in thefirst time window, first in ascending order of serving cell index andsecond in ascending order of PDCCH monitoring occasion index; a totalnumber of {serving cell, PDCCH monitoring occasion}-pair(s) comprisingDCI of a target format up to a current PDCCH monitoring occasion in thefirst time window.
 7. A method in a base station for wirelesscommunications, comprising: transmitting Q control signaling groupsrespectively in Q time windows, any of the Q control signaling groupscomprising a positive integer number of control signaling(s);transmitting a first control signaling, the first control signalingindicating Q1 time window(s) out of the Q time windows; and monitoring afirst radio signal on a first time-frequency resource; wherein any twotime windows of the Q time windows are orthogonal in time domain; anycontrol signaling comprised by the Q control signaling groups comprisesa first field; among the Q control signaling groups, first fields ofsame control signaling groups are of a same value; among Q2 adjacentcontrol signaling groups of the Q control signaling groups, first fieldsof different control signaling groups are of different values; the firstradio signal comprises first feedback information, the first feedbackinformation is used for determining whether bit blocks transmitted inthe Q1 time window(s) are correctly decoded, the Q is a positive integergreater than 1, and the Q1 and the Q2 are respectively positive integersno greater than the Q.
 8. The method according to claim 7, comprising:transmitting Q radio signal groups respectively in the Q time windows,the Q radio signal groups respectively comprise Q bit block groups, anybit block group of the Q bit block groups comprises a positive integernumber of bit block(s), any radio signal group of the Q radio signalgroups comprises a positive integer number of radio signal(s), whereinthe positive integer number of radio signal(s) respectivelycorresponds(correspond) to bit block(s) comprised in a corresponding bitblock group; wherein the bit blocks transmitted in the Q1 time window(s)comprise Q1 bit block group(s) of the Q bit block groups, and the Q1 bitblock groups(s) is(are) respectively transmitted in the Q1 timewindow(s).
 9. The method according to claim 7, wherein the first controlsignaling is used for determining at least the first time-frequencyresource between the first time-frequency resource and configurationinformation of the first radio signal, the configuration informationcomprises at least one of a Modulation and Coding Status, a RedundancyVersion (RV), a New Data Indication (NDI) or a reception parameter set.10. The method according to claim 7, wherein the first feedbackinformation comprises Q1 field(s), each of the Q1 field(s) comprises anequal number of bits, the Q1 field(s) respectivelycorresponds(correspond) to the Q1 time window(s), and each of the Q1field(s) is used for determining whether bit block(s) transmitted in acorresponding time window is(are) correctly decoded.
 11. The methodaccording to claim 7, wherein the first feedback information comprisesQ1 field(s), the Q1 field(s) respectively corresponds(correspond) to theQ1 time window(s), and each of the Q1 field(s) is used for determiningwhether bit block(s) transmitted in a corresponding time window is(are)correctly decoded, the first control signaling is used for determiningthe number of bit block(s) comprised in each of the Q1 field(s).
 12. Themethod according to claim 7, wherein the first control signaling istransmitted in a first time window, the first control signalingcomprises a second field, and the second field in the first controlsignaling is used for determining at least one of the following: anaccumulative number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising downlink control information (DCI) of a target format up to acurrent serving cell and a current PDCCH monitoring occasion in thefirst time window, first in ascending order of serving cell index andsecond in ascending order of PDCCH monitoring occasion index; a totalnumber of {serving cell, PDCCH monitoring occasion}-pair(s) comprisingDCI of a target format up to a current PDCCH monitoring occasion in thefirst time window.
 13. A UE for wireless communications, comprising: afirst receiver: receiving Q control signaling groups respectively in Qtime windows, any of the Q control signaling groups comprising apositive integer number of control signaling(s); and receiving a firstcontrol signaling, the first control signaling indicating Q1 timewindow(s) out of the Q time windows; a first transmitter: performingenergy detection so as to determine whether to perform a transmission ona first time-frequency resource; if yes, the first transmitter performsthe transmission to transmit a first radio signal on the firsttime-frequency resource, otherwise the first transmitter does notperform the transmission on the first time-frequency resource; whereinany two time windows of the Q time windows are orthogonal in timedomain; any control signaling comprised by the Q control signalinggroups comprises a first field; among the Q control signaling groups,first fields of same control signaling groups are of a same value; amongQ2 adjacent control signaling groups of the Q control signaling groups,first fields of different control signaling groups are of differentvalues; the first radio signal comprises first feedback information, thefirst feedback information is used for determining whether bit blockstransmitted in the Q1 time window(s) are correctly decoded, the Q is apositive integer greater than 1, and the Q1 and the Q2 are respectivelypositive integers no greater than the Q.
 14. The UE according to claim13, comprising: a first receiver: receiving Q radio signal groupsrespectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, of which any bit block groupcomprises a positive integer number of bit block(s), any radio signalgroup of the Q radio signal groups comprises a positive integer numberof radio signal(s), wherein the positive integer number of radiosignal(s) respectively corresponds(correspond) to bit block(s) comprisedin a corresponding bit block group; wherein the bit blocks transmittedin the Q1 time window(s) comprise Q1 bit block group(s) of the Q bitblock groups, and the Q1 bit block group(s) is(are) respectivelytransmitted in the Q1 time window(s).
 15. The UE according to claim 13,wherein the first feedback information comprises Q1 field(s), the Q1field(s) respectively corresponds(correspond) to the Q1 time window(s),and each of the Q1 field(s) is used for determining whether bit block(s)transmitted in a corresponding time window is(are) correctly decoded,the first control signaling is used for determining the number of bitblock(s) comprised in each of the Q1 field(s).
 16. The UE according toclaim 13, wherein the first control signaling is transmitted in a firsttime window, the first control signaling comprises a second field, andthe second field in the first control signaling is used for determiningat least one of the following: an accumulative number of {serving cell,PDCCH monitoring occasion}-pair(s) comprising downlink controlinformation (DCI) of a target format up to a current serving cell and acurrent PDCCH monitoring occasion in the first time window, first inascending order of serving cell index and second in ascending order ofPDCCH monitoring occasion index; a total number of {serving cell, PDCCHmonitoring occasion}-pair(s) comprising DCI of a target format up to acurrent PDCCH monitoring occasion in the first time window.
 17. A basestation for wireless communications, comprising: a second transmitter:transmitting Q control signaling groups respectively in Q time windows,any of the Q control signaling groups comprising a positive integernumber of control signaling(s); and transmitting a first controlsignaling, the first control signaling indicating Q1 time window(s) outof the Q time windows; a second receiver: monitoring a first radiosignal on a first time-frequency resource; wherein any two time windowsof the Q time windows are orthogonal in time domain; any controlsignaling comprised by the Q control signaling groups comprises a firstfield; among the Q control signaling groups, first fields of samecontrol signaling groups are of a same value; among Q2 adjacent controlsignaling groups of the Q control signaling groups, first fields ofdifferent control signaling groups are of different values; the firstradio signal comprises first feedback information, the first feedbackinformation is used for determining whether bit blocks transmitted inthe Q1 time window(s) are correctly decoded, the Q is a positive integergreater than 1, and the Q1 and the Q2 are respectively positive integersno greater than the Q.
 18. The base station according to claim 17,comprising: a second transmitter: transmitting Q radio signal groupsrespectively in the Q time windows, the Q radio signal groupsrespectively comprise Q bit block groups, any bit block group of the Qbit block groups comprises a positive integer number of bit block(s),any radio signal group of the Q radio signal groups comprises a positiveinteger number of radio signal(s), wherein the positive integer numberof radio signal(s) respectively corresponds(correspond) to bit block(s)comprised in a corresponding bit block group; wherein the bit blockstransmitted in the Q1 time window(s) comprise Q1 bit block group(s) ofthe Q bit block groups, and the Q1 bit block groups(s) is(are)respectively transmitted in the Q1 time window(s).
 19. The base stationaccording to claim 17, wherein the first feedback information comprisesQ1 field(s), the Q1 field(s) respectively corresponds(correspond) to theQ1 time window(s), and each of the Q1 field(s) is used for determiningwhether bit block(s) transmitted in a corresponding time window is(are)correctly decoded, the first control signaling is used for determiningthe number of bit block(s) comprised in each of the Q1 field(s).
 20. Thebase station according to claim 17, wherein the first control signalingis transmitted in a first time window, the first control signalingcomprises a second field, and the second field in the first controlsignaling is used for determining at least one of the following: anaccumulative number of {serving cell, PDCCH monitoring occasion}-pair(s)comprising downlink control information (DCI) of a target format up to acurrent serving cell and a current PDCCH monitoring occasion in thefirst time window, first in ascending order of serving cell index andsecond in ascending order of PDCCH monitoring occasion index; a totalnumber of {serving cell, PDCCH monitoring occasion}-pair(s) comprisingDCI of a target format up to a current PDCCH monitoring occasion in thefirst time window.